I want to lay radiant flooring in some concrete that we have already poured. The slab is 10x10, but I only want radiant flooring in a strip of 3x7. I need to remove some concrete in order to do this. What is the best way for someone to remove 1/2 inch off the surface of concrete slab. We need to remove 1/2 inch from a slab of concrete, depth wise, in order to lay the radiant flooring down before we put tile on top of it so that all of the tile (from the non radiant floor and the radiant floor) will be even. What would you recommend would be the fastest and easiest way to accomplish this? What tools would I require?